[Middle picture by Matt Rhodes; unknown artist for the first picture. The others are assumed to be drawn by Steve Klit.
Except the first picture (which is from “Dragon Age II: The Complete Official Guide”), they are all from the official website.]
[First picture (which I assume is the Deep Roads) is from “Dragon Age II: The Complete Official Guide”; the others are from the Dragon Age II official website.
I believe these were all drawn by Steve Klit, but I may be wrong.]